Visible to Intel only — GUID: dmi1416925417602
Ixiasoft
3.4.3. Viterbi Parameters
Parameter | Value | Description |
---|---|---|
Maximum constraint length (LMAX) | 5 to 9 (hybrid) 3 to 9 (parallel) |
The maximum constraint length LMAX. . |
ACS Units (A) | 1, 2, 4, 8, or 16 | The number of ACS units, which adds a degree of parallelism (hybrid architecture only). The range of values available depends upon the value of maximum constraint length LMAX. |
Traceback (v) | 8 (minimum) | The traceback length, which is the number of stages in the trellis that are traced back to obtain a decoded bit. It is typically set to 6 × L for unpunctured codes, and up to 15 × L for highly punctured codes. |
Softbits (softbits) | 1 to 16 | The number of soft decision bits per symbol. When softbits is set to 1 bit, the decoder acts as a hard decision decoder, and still allows for erased symbols to be entered using the eras_sym input. |
Bmgwide | – | The precision of the state metric accumulation. The parameter editor selects and displays the optimum value, which depends on NMAX, LMAX and, softbits. |